Running different OSes on classic hardware (Re: Re installing XP on Sony)

[woodelf]

Tom Jennings wrote:

>
> I'm still impressed by a million ops/second. Imagine! One million!
>
I'm  still working getting a homebrew computer with a million ops/sec.
The  problem is a REAL instruction requires TWO memory cycles
at least so that is 500 ns memory cycle and normal ( read vintage
parts since they don't make new I/O chips) I/O parts just meet that speed.

> I feel like one of those jungle tribe people who count "one, two,
> three... many".
>
Better than most sales-droids. :-)

> Most of the TTL computers are more-or-less one million -- the mini
> era. It's like 100 KHz for tubes, there were plenty faster but
> straightforward design ignoring transmission line issues seems to
> be these two numbers.

How ever most TTL computers still used core memory so the
split cycle was very matched  for  ISZ/DSZ type  instructions.
That requires a whole  new cycle  generaly since most  modern
memory does not suport  read/modify/write cycles.  The  2167
16kx1 does have data  in so this may be a useful chip for
modem memory in old computers.

> They always seem crisp with a 9600 bits/sec console :-)
>
Gasp I hope to get 2400 baud. -:)

>
> More seriously, most people grossly overrate the importance of CPU
> speed within some reasonably local framework. We've got students
> at UCI doing 3D image rendering, OK, CPU matters there (especially
> with bloatware), but for general purpose computing the CPU is
> usually waiting for you to type something.

Or read the stuff.
Ben alias woodelf.